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SUMMARY:Shouting at a Staircase: Acoustic Scattering off a Plane with a St
 ep - Mungo Aitken
DTSTART:20190219T110000Z
DTEND:20190219T120000Z
UID:TALK119176@talks.cam.ac.uk
CONTACT:Matthew Priddin
DESCRIPTION:There has been interest in reducing the noise emitted by subma
 rines for a variety of reasons including defence\, environmental and ecolo
 gical issues. One way to do so is to optimally place the ribs/bulkheads al
 ong the hull of the submarine to minimise emitted sound. Computational mod
 els are not feasible for this purpose as a fine-grained mesh is required t
 o simulate at sufficient detail\, but such a mesh is too computationally d
 emanding for practical purposes. An analytical model must therefore be use
 d as a starting point. \n\nI will present a much-simplified model consisti
 ng of an acoustic wave scattering off a plane with a small step\, where th
 e aim is to find the scattering potential. The general strategy for solvin
 g the problem will be outlined. The problem will then be compared with tha
 t of diffraction by a plate of finite thickness\, as considered in the 197
 3 paper by Crighton and Leppington. I will show how symmetry and the solut
 ion to the Crighton and Leppington paper can be used to find the solution 
 for our problem of the plane with a small step.
LOCATION:CMS MR14
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